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2 years ago

Pls pls pls answer quick

Mathematics

1 answer:

antoniya [11.8K]2 years ago

5 0

Answer:

5x+3=3x+15

Subtract 3 from both sides

5x=3x+12

Subtract 3x from both sides

2x=12

Divide both sides by 2

Step-by-step explanation:

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-2/9 +1/5 help me please

kodGreya [7K]

Answer:

-1/45

Step-by-step explanation:

I did the equation okay hope this help!! <3

6 0

3 years ago

Read 2 more answers

Estimate:________<br>74,529<br>- 38453

kiruha [24]

Answer:

35,000?

Step-by-step explanation:

3 0

3 years ago

A father is ten times as old as his daughter. In 5 years he will be just five times as old as she will be. How old are they now?

Nonamiya [84]

She is four years old which makes her father 40 that's ten times her age in five years she'll be 9 and he will be 45 which is 5 times her age. hope that helped you out.

8 0

3 years ago

Hi need help for this maths question

Sauron [17]

a) If f(y) is a probability density function, then both f(y) ≥ 0 for all y in its support, and the integral of f(y) over its entire support should be 1. eˣ > 0 for all real x, so the first condition is met. We have

$\displaystyle \int_{-\infty}^\infty f(y) \, dy = \frac14 \int_0^\infty e^{-\frac y4} \, dy = -\left(\lim_{y\to\infty}e^{-\frac y4} - e^0\right) = \boxed{1}$

so both conditions are met and f(y) is indeed a PDF.

b) The probability P(Y > 4) is given by the integral,

$\displaystyle \int_{-\infty}^4 f(y) \, dy = \frac14 \int_0^4 e^{-\frac y4} \, dy = -\left(e^{-1} - e^0\right) = \frac{e - 1}{e} \approx \boxed{0.632}$

c) The mean is given by the integral,

$\displaystyle \int_{-\infty}^\infty y f(y) \, dy = \frac14 \int_0^\infty y e^{-\frac y4} \, dy$

Integrate by parts, with

$u = y \implies du = dy$

$dv = e^{-\frac y4} \, dy \implies v = -4 e^{-\frac y4}$

Then

$\displaystyle \int_{-\infty}^\infty y f(y) \, dy = \frac14 \left(\left(\lim_{y\to\infty}\left(-4y e^{-\frac y4}\right) - \left(-4\cdot0\cdot e^0\right)\right) + 4 \int_0^\infty e^{-\frac y4} \, dy\right)$

$\displaystyle \cdots = \int_0^\infty e^{-\frac y4} \, dy$

$\displaystyle \cdots = -4 \left(\lim_{y\to\infty} e^{-\frac y4} - e^0\right) = \boxed{4}$

8 0

2 years ago

The price (p) of an item is marked down 20%. Write two expression that represent the sale price.

Fiesta28 [93]

Answer:

So I would say any one of the following:

(1-.2)p

p-.2p

.8p

Step-by-step explanation:

If you start with price p and you are getting it marked down 20%, then you are paying (100-20)%p.

So you have:

(1-.2)p

or if you use distributive property:

1(p)-.2(p)

p-.2p

or if you combine the like terms:

.8p

4 0

3 years ago